According to the present invention, by using a complex gas-water atomizing method; zirconium and zirconium alloy powders having an average particle diameter of 10 μm or less is able to be prepared; and an oxygen and nitrogen content in the powder are equal or less than 1000 ppm respectively, which are very low. As a condition for the present invention, a nozzle diameter of a tundish should be 4-10 mm; an injection pressure of an inert gas should be 20-50 bar, and a quantity of injection should be in a range of 10-30 liter/min when a first injection is performed; and a water pressure should be in a range of 300-1000 bar and a quantity of injection should be in a range of 200-700 liter/min when a second injection is performed.;COPYRIGHT KIPO 2017
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